What is the theme in Shadow of the Almighty by Elisabeth Elliot?

The spiritual themes that run through Jim Elliot's life story all stem from trusting God. This trust gives Jim the courage to talk about spiritual matters and carry his Bible as an adolescent in high school, and when he moves off to Wheaton College as a young man. Although he has the personality and looks to be popular, he trusts God's Word to rule his life and does not participate in activities that he considers frivolous or that have no eternal value. He even chooses not to date to avoid having a girl turn him from his purpose in following God. Yet, when he meets Elisabeth he falls in love. However, he trusts God with those feelings as he seeks to follow His purpose for the mission field and the Apostle Paul's example of being single. He doesn't disavow the possibility of marriage in the future but is willing to accept that status only if it is God's will for his life.